Brake



Oct. 14, 1941. F. c. FRANK 2,258,888

BRAKE Original FiledJune 22, 1934 2 sheets-shawl INVEN TOR.

* fkozmaa c. Flzanu ATTORNEY.

Oct. 14,1941. F. c. FRANK 2,258,888

BRAKE I Original Filed June 22, 1934 2 "Sheefs-Sheet 2 536 Fla. 2

INVEN TOR.

BY 'FREDERICK C. F auK.

ATTORNEY I Frederick 0. Frank. Sou

ndix Products Corporation, 8 a corporation of Indiana Driginaiapplication dune 731,939, new Patent No. 23, 1940. -;Divlded and thisapplicati til 1938, Serial N0. 212,447

. I 2 Claims. (on. lac-152) application is a division of my copendingapplication Serial No. 731,939, filed June 22, 1934, and issued July 23,1940, as Patent No. 2,208,575.

One of the objects of this invention is the provision of a brakingsystem for airplanes which is very simple and economical to design andbuild.

A further feature is-the design of the supporting members for the brakeshoes and wheel cylinders, especially in that there is provided a brakeflange arranged to be shrunk upon the axle of the wheel associatedtherewith.

Further features and objects of the invention will be apparent after areading oi the subjoined specification and claims and after aconsideration of the accompanyingdrawingain which:

Figure 1 is a view partly diagrammatic, partly in elevation, and partly\in section illustrating my invention, but having some parts broken awayfor cleamess; n

Figure 2 is an enlarged view in elevation of the wheel structure whichis shown more or less diagrammatically in Figure 1, some parts beingremoved for clearness;

Figure 8 is a view on an enlarged scale and in section of the wheelshown in Figure 2, being taken substantially on the line 33 of Figure-2;and

Figure 4 is a fragmentary view in section show- Bend, ins, assignor toouth Bend, no,

22, 1934. Serial, No. 2,208,575, 1 M July on June 8,

ructure is somewhat similar to the structure disclosed in my copendingapplication Serial No. 723,789, new issued as Patent No. 2,038,213, andthe arrangement of the'central cast spider'iormed with the integralapplying cylinder and with integral armsserving to anchor the brakemembers, to position the brake members radially of the drum, and todetermine the released position or the brake members is 4. This stintended to be claimed in said copending applica tion, as ,is also thecombination of such a cast member with a stamped portion.

As shown in Figures 2, 3 and 4 there is provided a drum 5| I with whichthere are associated brake shoes 542 and 548. The shoes are similarlyconnected by an adjustable link SN and there is provided a cast spiderML The spider Ell is formed with arms 52:, 525, 525 and 521 and 521.

ing a portion of the structure shown in Figure 2, V

with the axle removed.

Referring particularly to the structure shown in Figure 1, it may beseen that. there is illustrated a-brake pedal I0 pivoted upon a rudderpedal I2. The pedal III is connected by a'link I4 with a lever I8adapted to rotate the shaft N3 of the master cylinder I20.

To the cylinder I20 there is connected a conduit 34 leading to a wheelcylinder I36. The wheel cylinder I38 is mounted on a backing plate of alanding wheel 38. The wheel cylinder maybe provided with a piston I 40contacting with one end 0! a brake shoe I42 and adapted to urge s idshoe into contact with the drum I44. The s cc I42 may be connected withthe secondary shoe I48, which may be pivotally anchored at I48 adj acentto the cylinder I36. n when filling the system, the filler member 52 ofthe cylinder I20 may have attached thereto a sleeve 54 containing avalve 58 controlling a conduit 58 leading from a supply reservoir 60.

The arms 525 and 525 are provided with rollers 555 and 555 fordetermining the released position of the shoes and the arms'i2'l and 521are provided with spring pressed steady rests I59 and 559 fordetermining the lateral position oi the shoes. The arm 523 is providedwith an anchor pin 548, and a cylinder 538 east integrally therewith.The cylinder is provided with a piston, not shown, connected by a pistonrod 541 with the applying end of the shoe 542. A dust cap 554 is alsoprovided for the end of the cylinder. As is shown more clearly in Figure3 the arm 523 is formed with a passageway 565 through which the spring Iextends. The shoe 548 is connected to the. arm 621 by a spring 563 whichtogether with The wheel and wheel brake structure of Fig- I the spring"I connected to the upper ends of the shoes '42 and 546 serves to returnthe shoes to their released position when the brake applying force iswithdrawn.

As may be seen most clearly in Figure 3, the spider 5" together with thecylinder 536 is positioned exactly in the central plane of the shoes andthe brake drum. The spider BI'I carries a light stamped plate 661 whichserves to prevent the entrance of dirt into the drum and which togetherwith the spider forms the backing plate for the brake.

My improved arrangement by which the various parts of the brake aresecured to the wheel "and to the axle may be seen most clearly inFigures 2, 3 and 4. The stub axle 589 which carries a supporting part ofthe airplane or other vehicle is formed with a plurality of integralspline elements such as 513 having radial projections 513. I provide acollar 515 formed with a brake mounting flange ill and a bearing spacersleeve are. The interior of the sleeve is formed so as to com- The, stubshaft 569 is supported by a smalldiameter wheel generally designated583. This wheel 583 is formed almost entirely in one piece, but ishollow and is formed with openings wherever possible in order todecrease the weight. Interposed between the wheel and the axle arebearings 595 and 591. The former is positioned between the edge of thesleeve 519 and a flange 589 formed as a portion of the wheel 583. Thebearing 58! is positioned between a flange 59l similarly formed as apart of the wheel 583 and a nut 593 s rewed upon the outer end of theshaft 569. Thus the collar 515, the bearings 585 and 581, and the wheel583 are clamped between the radial projections 5'I3 on the splines 513and the nut 593. This obviously holds the sleeve 515 and with it thestator parts of the brake against lateral movement as well as againstmovement of rotation on the stub shaft 559 and holds the wheel 593against lateral movement on said shaft while allowing rotation thereof.

Th wheel 583 has formed integrally therewith a drum shaped portion 595within which there is positioned the separate drum 5 as a liner. Theouter side of the wheel 583 is closed by a cap member 591 and a fairingplate 599.

It is believed that the operation of the structure disclosed would beobvious from the above description. Therein the operator presses uponthe pedal Hi. This movement forces fluid through the conduit to thewheel cylinder and thus forces the piston outwardly to apply the shoe542 to the drum. The movement of the drum carries the shoe around andthus-applies the shoe 546 to the drum. Both shoes anchor upon the anchor543 and the spider transmits the braking torque to the axle of thevehicle. when the braking pressure is released the springs correspondingto the springs l and 533 withdraw the shoes from their contact with thedrum and the braking action is thus released.

It is to be understood that the above-described embodiments of myinvention are for the purpose of illustration only and various changesmay be made therein without departing from the spirit and scope of theinvention.

I claim:

1. In a wheel structure for airplanes, a stub axle formed with splines,an internally grooved sleeve complementing said splines and secured tosaid axle thereby, a brake including stator members and rotor members, asupporting spider for the stator members of said brake, and means

